Horst Schönau (born 2 April 1949 in Waltershausen, Thuringia) is an East German bobsledder who competed in the late 1970s and early 1980s. He won a bronze medal in the four-man event at the 1980 Winter Olympics in Lake Placid.

Schönau also won a complete set of medals at the FIBT World Championships with a gold (Four-man: 1978), a silver (Two-man: 1981), and a bronze (Two-man: 1982).